Electrical addressing of confined quantum systems for quasiclassical computation and finite state logic machines

被引:34
作者
Remacle, F
Heath, JR
Levine, RD [1 ]
机构
[1] Hebrew Univ Jerusalem, Fritz Haber Res Ctr Mol Dynam, IL-91904 Jerusalem, Israel
[2] Univ Liege, Dept Chim, B-4000 Liege, Belgium
[3] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
[4] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA
关键词
conduction spectroscopy; nanoelectronics; quantum dots; single electron transistors; molecular logic;
D O I
10.1073/pnas.0501623102
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Conduction spectroscopy measures the current I through a nanosystem as a function of the voltage V between two electrodes. The differential conductance, dl/dV, has peaks that can be assigned to resonance conditions with different electronic levels of the system. Between these increments, the current has roughly constant plateaus. We discuss how measurements of the current vs. voltage can be used to perform Boolean operations and hence construct finite state logic machines and combinational circuits. The inputs to the device are the source-drain voltage, including its sign, and a gate voltage applied in a manner analogous to optical Stark spectroscopy. As simple examples, we describe a two-state set-reset machine (a machine whose output depends on the input and also on its present state) and a full adder circuit (a circuit that requires three inputs and provides two outputs).
引用
收藏
页码:5653 / 5658
页数:6
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